--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommscontroller/mmccdtmfpayloadformat/src/dtmfencstatemachine.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,243 @@
+/*
+* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    State machine for DTMF payload format encoding and sending.
+*
+*/
+
+
+
+
+// INCLUDES
+#include "dtmfencstatemachine.h"
+#include "dtmfpayloadformatdefs.h"
+
+// ======== MEMBER FUNCTIONS ========
+
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::CMccSymDtmfStream
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// ---------------------------------------------------------------------------
+//
+CDtmfEncStateMachine::CDtmfEncStateMachine( MDtmfEncClient& aClient )
+    : CActive( EPriorityStandard ), iClient( aClient ),
+    iState( EStateSendingIdle )
+    {
+    CActiveScheduler::Add( this );
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::NewL
+// Two-phased constructor
+// ---------------------------------------------------------------------------
+//
+CDtmfEncStateMachine* CDtmfEncStateMachine::NewL( MDtmfEncClient& aClient )
+    {
+    CDtmfEncStateMachine* self = 
+        new( ELeave ) CDtmfEncStateMachine( aClient );
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::~CDtmfEncStateMachine
+// Destructor.
+// ---------------------------------------------------------------------------
+//
+CDtmfEncStateMachine::~CDtmfEncStateMachine()
+    {
+    Cancel();
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::State
+// Returns current state.
+// ---------------------------------------------------------------------------
+//
+TDTMFSendingState CDtmfEncStateMachine::State() const
+    {
+    return iState;
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::ChangeStateTo
+// Changes state to the new one if transition is valid.
+// ---------------------------------------------------------------------------
+//
+void CDtmfEncStateMachine::ChangeStateTo( TDTMFSendingState aNewState )
+    {
+    DP_DTMF_WRITE3( _L("CDtmfEncStateMachine::ChangeStateTo aNewState: %d iState: %d"), 
+        aNewState, iState );
+    
+    TBool validTransition( EFalse );
+    switch ( aNewState )
+        {
+        case EStateSendingIdle:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateSendingIdle") );
+            
+            if ( EStateEncodeNextDigit == iState || 
+                 EStateSendStopped == iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+            
+        case EStateEncodeNextDigit:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateEncodeNextDigit") );
+            
+            if ( EStateToneOn != iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+            
+        case EStateToneOn:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateToneOn") );
+            
+            if ( EStateEncodeNextDigit == iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+
+        case EStateToneOff:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateToneOff") );
+            
+            if ( EStateToneOn == iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+
+        case EStateSendPaused:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateSendPaused") );
+            
+            if ( EStateEncodeNextDigit == iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+            
+        case EStateSendStopped:
+            DP_DTMF_WRITE( _L("ChangeStateTo: EStateSendStopped") );
+            
+            if ( EStateEncodeNextDigit == iState )
+                {
+                validTransition = ETrue;
+                }
+            break;
+        
+        default:
+            DP_DTMF_WRITE( _L("ChangeStateTo: default") );
+            break;            
+        }
+    
+    // Change the state if everything is OK.
+    if ( validTransition && !IsActive() )
+        {
+        iState = aNewState;
+        
+        // Do the active state transfer only if needed. This saves again a
+        // few cycles by not doing idle rounds trough activescheduler.
+        if ( EStateEncodeNextDigit == iState ||
+             EStateToneOn == iState || 
+             EStateToneOff == iState )
+            {
+            TRequestStatus* stat = &iStatus;
+            User::RequestComplete( stat, KErrNone );
+            SetActive();
+            }
+        }
+    
+    DP_DTMF_WRITE3( _L("ChangeStateTo - VALIDITY: %d, ACTIVE: %d"),
+        validTransition, IsActive() );
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::RunL
+// Handles an active object’s request completion event.
+// ---------------------------------------------------------------------------
+//
+void CDtmfEncStateMachine::RunL()
+    {
+    DP_DTMF_WRITE2( _L("CDtmfEncStateMachine::RunL - status: %d"), 
+        iStatus.Int() );
+
+    if ( KErrNone == iStatus.Int() )
+        {
+        switch ( iState )
+            {
+            case EStateEncodeNextDigit:
+                iClient.EncodeNextDigitL();
+                break;
+            case EStateToneOn:
+                iClient.DoToneOnActionsL( ETrue );
+                break;
+            case EStateToneOff:
+                iClient.DoToneOffActionsL( ETrue );
+                break;
+            case EStateSendingIdle:
+            case EStateSendPaused:
+            case EStateSendStopped:
+                break;
+            default:
+                break;
+            }
+        }
+    else
+        {
+        User::Leave( iStatus.Int() );
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::DoCancel
+// Implements cancellation of an outstanding request.
+// ---------------------------------------------------------------------------
+//
+void CDtmfEncStateMachine::DoCancel()
+    {
+    DP_DTMF_WRITE( _L("CDtmfEncStateMachine::DoCancel") );
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::RunError
+// Error handling of the active object.
+// ---------------------------------------------------------------------------
+//
+TInt CDtmfEncStateMachine::RunError( TInt aError )
+    {
+    DP_DTMF_WRITE2( _L("CDtmfEncStateMachine::RunError aError: %d"), aError );
+    
+    if ( KErrNoMemory == aError )
+        {
+        return KErrNoMemory;
+        }
+    else
+        {
+        return KErrNone;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// CDtmfEncStateMachine::ResetStateMachine
+// ---------------------------------------------------------------------------
+//
+void CDtmfEncStateMachine::ResetStateMachine()
+    {
+    Cancel();
+    iState = EStateSendingIdle;
+    }
+
+//  End of File